Wristwatch



FIG. 1 is a front elevational view of a wristwatch showing my new design;

FIG. 2 is a back elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a left side elevational view thereof;

FIG. 7 is a front, right side perspective view thereof; and,

FIG. 8 is a back, left side perspective view thereof.

The broken lines depict portions of the wristwatch that form no part of the claimed design. 

CLAIM The ornamental design for a wristwatch, as shown and described. 